diff --git a/src/ViewerTest/ViewerTest.cxx b/src/ViewerTest/ViewerTest.cxx
index 34bdb9f079..c19ba0bab1 100644
--- a/src/ViewerTest/ViewerTest.cxx
+++ b/src/ViewerTest/ViewerTest.cxx
@@ -3144,6 +3144,7 @@ static Standard_Integer VAspects (Draw_Interpretor& theDI,
           || anArg == "-setsilhouette"
           || anArg == "-outline"
           || anArg == "-outlined"
+          || anArg == "-drawsilhouette"
           || anArg == "-silhouette")
     {
       bool toDrawOutline = true;